EDA Installation & Checkout Flow Chart
start
ARE
ALL REQUIRED NO PARTS
AVAILABLE
?
PROCURE
MISSING PARTS
Required Parts (all applications)
EDA Unit, with check/flow restrictor & label Appropriate SignatureStatt Thermostat 46M98 − Outdoor Sensor
84X49 − Twisted Pair Wire Appropriate Insulation and Piping Kit
Required Parts (2−Stage Heat Pump appl.)
12P61 − 75VA Transformer (for HP applications)
YES 
Installation Process
Check Dehumidification Operation
ENSURE ALL POWER IS OFF
INSTALL EDA UNIT IN DUCT
SYSTEM
INSTALL THE CHARGE
COMPENSATOR (IF REQUIRED)
IN CONVENIENT LOCATION
(SEE FIGURE 5)
MAKE WIRING CONNECTIONS AS SHOWN IN FIGURES 12 & 13 (SEE PAGES 14 AND 15)
INSTALL
OUTDOOR UNIT
POWER UP THE INDOOR UNIT
SET COOLING SETPOINT ON ROOM THERMOSTAT TO 2 DEGREES ABOVE INDOOR TEMPERATURE (OUTDOOR UNIT WILL TURN OFF)
NOTE − A Humiditrol® EDA−equipped system is allowed to operate and cool room temperature below set point (but only by 2ºF) when trying to satisfy a persisting hu- midity set point.
SET DEHUMIDIFICATION SETPOINT TO 5% BELOW CURRENT ROOM RELATIVE HUMIDITY
MAKE ALL REFRIGERATION CONNECTIONS, BEING SURE TO INSTALL THE CHECK/FLOW RESTRICTOR (SEE FIGURE 5)
LEAK CHECK THE SYSTEM
WITH 3−WAY VALVE ASSEMBLY
SET TO ACUATE" (SEE
CHECK THAT 3−WAY VALVE
ASSEMBLY IS SET TO
SHOWN IN FIGURE 7
ENABLE HUMIDITROL ON ROOM THERMOSTAT (SEE FIGURE 8)
IS
THE OUTDOOR NO
TEMPERATURE BELOW
95ºF
?
YES
DEHUMIDIFICATION IS DE−ACTIVATED; CHECK FOR CORRECT OPERATION AT A TIME WHEN AMBIENT TEMPERATURE IS BELOW 95ºF.
FIGURE 7)
INSULATE ALL REFRIGERANT
LINES
EVACUATE THE SYSTEM AS
DESCRIBED IN THE OUTDOOR
UNIT INSTALLATION
INSTRUCTIONS
INSTALL OUTDOOR SENSOR
SET THERMOSTAT FOR
MAXIMUM COOLING
OPEN REFRIGERANT VALVES
TURN OUTDOOR UNIT MAIN
POWER ON
CHECK CHARGE AND CHARGE
AS NEEDED (SEE PAGE 8)
OUTDOOR UNIT:
COMPRESSOR IN HIGH STAGE;
FAN IN LOWEST SPEED;
EDA:
3−WAY VALVE ASSEMBLY TOTION" POSITION
INDOOR UNIT:
FAN IN DEHUMIDIFICATION SPEED
CHECK THE TEMPERATURE DIFFERENCE ACROSS THE EDA COIL AND THE LIQUID LINE TEMPERATURES AS NOTED IN FIGURE 9 ON PAGE 10
Figure 4
Page 6
EDA 01/06
